Humans have grid cells and place cells too. Unless you are completely disoriented, you always have a sense of where you are. I am now standing in my office. Even if I close my eyes, my sense of location persists, and I continue to know where I am. Keeping my eyes closed, I take two steps to my right and my sense of location in the room changes. The grid cells and place cells in my brain have created a map of my office, and they keep track of where I am in my office, even when my eyes are closed. As I walk, which cells are active changes to reflect my new location. Humans, rats, indeed all
...more
